0 to return to a place after you have been somewhere else -- volver
2 to have sth again after losing it -- recuperar
He will eventually get back the use of his left arm. Finalmente recuperará el uso de su brazo izquierdo.
3 to return to a former state, condition, or activity -- retroceder
Let’s get back to work. Volvamos al trabajo.
The city is still trying to get back to normal after the earthquake. La ciudad todavía está tratando de volver a la normalidad después del terremoto.
4 to take revenge -- vengarse
I’ll get you back for doing this! ¡Me vengaré por haberme hecho esto!